You need to type it explicitly, using 'tt'. 55 # Same goes for ん and ン, which are typed with nn or mm. .... "dzo" => "㠢ょ", 104 "dja" => "㠢ゃ", "djo" => "㠢ょ", 105 "bya" => "㠳ゃ", "byu" => "㠳ゅ", "byo" => "㠳ょ", 106 "pya" => "㠴ゃ", ...